Monckton’s silly graph: Part 4

Here we go again! Via RealClimate we have another silly graph from Monckton:

This is in response to Andy Revkin’s article in the New York Times on how industry scientists in 1995 concluded that ‘impact of human emissions of greenhouse gases such as CO2 on climate is well established and cannot be denied’

As RealClimate point out this is amusing because Monckton apparently thinks that;

trends from January 2002 are relevant to a complaint about a story discussing a 1995 report,

someone might be fooled by the cherry-picked January 2002 start date,

no-one would notice that he has just made up the IPCC projection curves

It is the last point that is most amusing since I have chronicled a few of Monckon’s dishonestsillygraphs, and more so because he was called out on a similar error just a couple of months ago.

Gavin Schmidt explains why Monckton’s Graph is absolute rubbish:

To see the extent of this chicanery, one needs only plot the actual IPCC projections against the observations. This can be done a number of ways, firstly, plotting the observational data and the models used by IPCC with a common baseline of 1980-1999 temperatures (as done in the 2007 report) (Note that the model output is for the annual mean, monthly variance would be larger):

These show clearly that 2002-2009 is way too short a period for the trends to be meaningful and that Monckton’s estimate of what the IPCC projects for the current period is woefully wrong. Not just wrong, fake.

Even if one assumes that the baseline should be the year 2002 making no allowance for internal variability (which makes no sense whatsoever), you would get the following graph:

– still nothing like Monckton showed. Instead, he appears to have derived his ‘projections’ by drawing a line from 2002 to a selection of real projections in 2100 and ignoring the fact that the actual projections accelerate as time goes on, and thus strongly over-estimating the projected changes that are expected now (see here).

Perhaps the most ironic aspect of this whole farce is that Monckton entitled his letter “Deliberate Misrepresentation“. This title may be the only true statement in it, of course not in the manner Monckton intended.